FURO[3',4':6,7]NAPHTHO[2,3-D]-1,3-DIOXOL-6-OL, 9-[(4-FLUOROPHENYL)AMINO]-5,5A,6,8,8A,9-HEXAHYDRO-5-(4-HYDROXY-3,5-DIMETHOXYPHENYL)-, (5R,5AR,8AS,9S)-